'variable' : static data members of managed classes must be defined within the class definition
You attempted to reference a static member of a NGWS class or interface outside the definition of that class or interface.
For example, the following example generates C3366:
#using <mscorlib.dll> __gc class X { public: static int i; // initialize i here to avoid C3366 }; int X::i = 5; // C3366 int main() { return 0; }